Texas Instruments

LM3421MH/NOPB  

External/Internal LED Drivers

LM3421MH/NOPB Description

The LM3421MH/NOPB from Texas Instruments is a high-performance DC-DC controller designed for driving external LED arrays with precision and efficiency. Operating within a 4.5V to 75V input range, it supports output voltages from 3V to 72V, making it versatile for a wide range of LED configurations. This surface-mount device (16-HTSSOP package) integrates advanced dimming capabilities, including analog and PWM dimming, and operates at a 2MHz switching frequency for compact, high-efficiency designs.

LM3421MH/NOPB Features

• Wide Input/Output Range: Supports 4.5V–75V input and 3V–72V output, ideal for automotive, industrial, and architectural lighting.
• Flexible Dimming: Analog and PWM dimming for precise brightness control.
• High-Frequency Operation: 2MHz switching reduces inductor size and PCB footprint.
• Robust Protection: Features like thermal shutdown and overcurrent protection enhance reliability.
• Compliance: ROHS3, REACH Unaffected, and MSL1 (Unlimited) for environmental and handling resilience.
• No Internal Switch: Allows designers to select external MOSFETs for optimized performance.

LM3421MH/NOPB Applications

• Automotive Lighting: Headlights, DRLs (Daytime Running Lights), and interior lighting due to wide voltage tolerance.
• Industrial LED Drivers: High-power LED arrays in factories, warehouses, and signage.
• Architectural Lighting: Precision dimming for dynamic façade and landscape lighting.
• Backlighting: LCD displays and billboards requiring stable, flicker-free illumination.

Conclusion of LM3421MH/NOPB

The LM3421MH/NOPB stands out for its wide voltage range, high-frequency operation, and dual dimming options, making it a superior choice for demanding LED applications. Its external MOSFET flexibility and robust protection features ensure reliability in harsh environments. Whether for automotive, industrial, or architectural uses, this controller delivers efficiency, precision, and scalability, backed by Texas Instruments' proven quality.

LM3421MH/NOPB Documents

Download datasheets and manufacturer documentation for LM3421MH/NOPB

Datasheets :

LM3421,23(Q1,Q0)      

Design Resources :

Lighting Product Selector       LM3421 Design with WEBENCH® Power Designer      

HTML Datasheet :

LM3421,23(Q1,Q0)      

PCN Design/Specification :

Cu Wire 17/Jun/2016       LM342y Datasheet 29/Aug/2019